Operating mechanism for motion picture projectors and phonographs



H. B. GARDNER OPERATING MECHANISM FOR MOTION PICTURE PROJECTORS AND PHONOGRAPHS May 28, 1935.

Filed May 9, 1952 8 Sheets-Sheet l May 28, 1935. H. B. GARDNER OPERATING MECHANISM FOR MOTION PICTURE PROJECTOKS AND PHONOGRAPHS Filed May 9, 1932 8 Sheets-Sheet 2 fizz/e7? for J-[ernzan E Gardner,

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OPERATING'MECHANISM FOR MOTION PICTURE PROJECTORS AND PHONOGRAPHS Filed May 9; 19732 8 Sheets-Sheet 4 Jilorkqys:

May 28, 1935. H. B. GARDNER OPERATING MECHANISM FOR MOTION PICTURE PROJECTORS AND PHONOGRAPHS 8 Sheets- Sheet 5 7 flo aw m 5 a 7 7 .W/T J 0 I 0 m; 1 16, a 0 IL J 6 MP 674. mmg

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H. B. GARDNER OPERATING MECHANISM FOR MOTION PICTURE PROJECTORS AND PHONOGRAPHS Filed May 9, 1952 6 My 5 m a I s J 9 w M Z 1 S, 8

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OPERATING MECHANISM FOR MQTION PICTURE PROJECTORS AND PHONOGRAPHS Filed may 9, 1932 -8-Sheets-Sheet 7 Patented May 28, 1935 UNITED STATES OPERATING MECHANISM FOR MOTION PIC TURE PROJECTORS AND PHONOGRAPHS Herman B. Gardner, Chicago, Ill., assignor of forty-nine per cent to Harry J. Lurie, Chicago, Ill.

Application May 9, 1932, Serial No. 610,206

Claims.

The invention relates to operating mechanism for motion picture projectors and phonographs, and has as its primary object the provision of improved mechanism for connecting the pro- 5 jector to the phonograph so that the two devices may be operated in synchronism or independently of each other.

One form or" the invention is embodied in a device which comprises a motion picture projector, a phonograph, an electric motor and improved mechanism operatively connecting the motor to the projector and the phonograph. The improved mechanism comprises means whereby the projector may be operated independently of the phonograph at a plurality of speeds, means whereby the phonograph may be operated independently of the projector at a plurality of predetermined speeds, means whereby the projector and the phonograph may be operated in synchronism to project a film while sounds recorded during the taking of the picture are reproduced, means whereby the projector may be operated to project a him while incidental music, etc., is reproduced by the phonograph, means for reproducing sound and pictures from a sound film, and means whereby the film may be rewound.

The improved mechanism is preferably controlled by a single knob or dial which may be adjusted manually to effect the various combinations described above.

The projector will handle film which must be run at difierent speeds and the phonograph is adapted to utilize the new type long-playing records as well as records of the older type. In practice, the new type long-playing records are rotated at 33 R. P. M. while the records of the older type are rotated at about 80 R. P. M.

It will become apparent from the following description that a combined motion picture projector and phonograph embodying the invention will provide a considerable variety of entertainment and requires no mechanical skill on the part of the operator.

Other objects and advantages will become apparent as the following detailed description progresses, reference being had to the accompanying drawings, wherein Figure l is a fragmentary vertical section taken through a cabinet in which apparatus embodying the invention are mounted, the apparatus being shown partly in section.

Figure 2 is a section taken on line 22 of Fig. 1, most of the cabinet being omitted in this view.

Figure 3 is an enlarged section taken on line 33 of Fig. 1.

Figure 4 is a section taken on line 44 of Fig. 3. 1

Figure 5 is a section taken on line 5-5 of Fig. 3.

Figure 6 is a plan view of the mechanism shown in Fig. 5.

Figure 7 is a plan View of the same mechanism, the parts being shown in changed positions.

Figure 8 is a section taken on line 88 of Fig. 4.

Figure 9 is a section taken on line 99 of Fig. 2.

Figure 10 is a section taken on line Ill-10 of Fig. 3.

Figure 11 is a section taken on line ll-l| of Fig. 3.

Figure 12 is a section taken on line l2-l2 of Fig. 9.

Figure 13 is a section taken on line |3|3 of Fig. 12.

Figure 14 is a developed view of a cam which forms part of the improved apparatus.

Figure 15 is a developed view of another cam which forms part of the improved apparatus.

Figure 16 is a section taken on line |6-l6 of Fig. 3.

Figure 17 is a section taken on line ll|'l of Fig. 3, and

Figure 18 is an end elevation of the cam shown in Fig. 16.

Referring for the present to Figures 1 and 9, the reference character 10 designates generally a housing or cabinet in which apparatus which embodies the invention is mounted. The cabinet ifl may be of any suitable or desired construction. In this instance, it comprises a projector compartment H, a phonograph compartment l2 and a compartment 13 in which a gear box [4 is disposed. It will be noted that the gear box I4 is secured by screws 5 to a shelf it which forms part of the cabinet 10.

A sound reproducing device or phonograph i8 is disposed in the compartment I2. The phonograph iB comprises a turntable I 9 which is mounted on the tapered upper end of a vertically disposed spindle or shaft 28, which shaft 20 projects from the gear box M. (See Figs. 1 and 4.) The phonograph 18 also comprises a movably mounted and electrically operated pickup device 22 of any suitable construction, the pickup device 22 being provided with the usual needle or stylus 23 adapted to traverse phonograph records placed on the turntable I0.

A motion picture projector 25 of any suitable or desired construction is mounted in the compartment II. In this instance, the projector 25 has associated with it, a take-up reel 26 and a rewinding reel 2?. (See Fig. 9.) The reels 26 and 21 are removably mounted on the squared ends of shafts 28 and 29, respectively. The

gear box.

projector 25 also comprises film advancing mechanism which is designated generally by the reference character "at and is adapted to advance the film intermittently. The film advancing mechanism 38 is driven by gearing 35 from a.

medium of a knob i8 and a dial 4!, the dial M being mounted on the front wall l ha of the cabinet lil. (See Fig. 2.) The knob 3E and the dial ii are provided with suitable indicia (not shown) whereby the operator may adjust the knob to any predetermined position. The knob ts is secured to the outer end of a shaft 33 which projects from the gear box til, the shaft @3 being rotatably and slidably mounted in a wall of the gear box and in a bracket 3d mounted on the (See Figs. 3 and l.) Constrained to rotate with the shaft 33 and disposed intermediate the bracket l l and the gear box is a disc 46 having eight tapered holes 38 formed therethrough. A pin 39 carried by the bracket il lis engageable with the holes d3, when the disc it occupies the position wherein it is shown in full lines in Fig. 4. interposed between the gear box i i and the disc 46 is a compression spring 58 which yieldingly urges theshaft G3 and the disc E6 to the right (Fig. 4) The construction is such that the operator may displace the shaft longitudinallyagainst the action of the spring hi! to disengage the disc 56 from the pin d9 whereupon the knob filil may be angularly displaced to bring another hole 48 into registry with the pin 19. Then when the operator permits the spring 583 to restore the shaft 43 and the disc 4% to their original positions, the pin 49 will enter the hole 18 which has been brought into registry with it. The purpose of this con-' struction will presently appear.

Splined to the inner end of the shaft 53 is a bevel gear 52 which meshes with a bevelgear 53 fixed to a shaft 5 3 rotatably journaled in the gear box. (See Fig. 3.) The shaft 5'3 extends at right angles to the shaft 63. A cam 58 keyed to the shaft 5 1 is provided with cam slots til, 62 and 63.- A cam 55 fixed to the shaft 54 is provided with cam slots 65 and 67!. Associated with the cam slots 52, 63, lit and El are levers it, ll, '52 and '53, respectively, the levers 16, ll, 72 and'iS being pivoted on pins l5, l6, Ti, and i3, respectively. The free ends of the levers are provided with pins 88, or the equivalent, which ride in the cam slots;

Pivoted to the pins i5, i6, ll and 73 are levers El, 82, 83 and as, respectively, which are bifurcated at their free ends, the bifurcations being provided with pins 85 which ride in annular grooves provided in a plurality of clutch collars Q1, 92, 93 and 9d controlled by the levers 8!, 82, 83 and 8 respectively. The clutch collars 9i and 92 are splined on a shaft 96, the clutch collars 93 and 9 being splined on a shaft er. The shafts 9B and 97 are rotatably journaled in the gear box M and project therefrom as best shown in Fig. 3. v

. The levers l0, ll, 12 and it are substantially identical'in construction and thelevers Bl, 82,

83 and 8d are also substantially identical in construction, these levers being made in rights'and lefts when such construction is required.

The construction of the levers l3 and 84 is illustrated in detail in Figs. 5 to '7, inclusive. It will be noted that a leaf spring mo has one of its ends disposed between bifurcations NH formed integral with the lever l3, the other end of the leaf spring being disposed between bifurcations Ifiliformed integral with the lever 84. The construction is such that if the lever 73 is angularly displaced in either direction, the spring Hill will yieldingly urge the lever 84 in the same direction.

The lever 73 is provided with an arm m5 engageabl'e with the lever 8 intermediate its ends. If the lever '13 is displaced in a counter clockwise direction (Figs. 6 and 7), the arm H35 will engage the lever 3 and angularly displace it in the same direction so that there cannot be any relative movement between the two levers during such displacement through the action of the spring lfiil.

Formed integral with the clutch collar 94 are clutch jaws IE]? which are engageable with clutch jaws 38 formed integral with a clutch member H39 rotatably journaled on a bushing HE! which journals the shaft 9?. A gear l 52 is formed integral with the clutch member I99.

If it is assumed that the clutchcollar 9 i is in a position wherein its jaws Hill are disengaged from the jaws 6638, it will be readily understood that if the lever 73 is displaced in a clock-wise direction (Fig. 6), the spring it!) will yieldingly urge the lever 8 in the same direction so that the jaws It! will be urged into operative engagement with the jaws 88 as soon as the jaws come into registery with each other. struction permits the jaws Sill and N38 to be engaged with each other while the apparatus is not in operation and also preventsthe jaws from being damaged when they are brought into engagement with each other. When the clutch jaws iii? are to be disengaged from the clutch jaws H33, the lever 1'3 is angularly displaced in acounter clock-wise direction (Fig. 6)

so that the arm i 95 angularly displaces the lever 8 3 in the same direction. Such displacement of lever 8:3 forces the clutch jaws Nil out of engagement with the jaws I58.

It will be noted that each of the set of levers 'll!8l, ll-32 and IE-83 is provided with a leaf spring corresponding to the leaf spring I80 and having the same function. Likewise, each of the'levers W, H and i2 is provided with an arm which corresponds to the arm hi5and has the same function.

The clutch collar 9i is provided with integral clutch jaws E26 which are engageable with clutch jaws 524 formed integral with a clutch member are, the clutch member i22 having a gear l23 formed integral with it. The clutch collar 82 is provided with integral clutch jaws 525 which are engageable with clutch jaws I25 formed integral with a clutch member l2? which is keyed to one end of a shaft I28 rotatably journaled in the gear box. A clutch member ltil keyed to the other end of the shaft M8 is provided withintegral clutch jaws it! which are engageable with clutch jaws E32 formed integral with the clutch collar 93.

A worm E35 is cut in the shaft 128 and meshes with a worm wheel E35 fixed to the shaft or spindle 28 which drives the turntable 59.

The cam slots 62, 63, 65 and 81 are of such conformation that when the cams Bil and 55 are rotated to bring them into any predetermined position, certain sets of cooperating clutch jaws described above will be engaged with each other This conand other sets of the cooperating clutch jaws will be disengaged from each other. It will be readily understood that th indicia (not shown) on the dial M will indicate the condition which obtains when the cams E and 65 are in any of their positions corresponding to the holes 48 in the disc 45. The dial will indicate that the clutch devices described above are adjusted to drive the phonograph device and the projector at predetermined speeds or to drive either of the devices at a predetermined speed while the other device is functionally inoperative. The operation of the apparatus is described in detail below.

The shafts 95 and 9'! are operatively connected to an electric motor MU mounted on the gear box l5. (See Fig. 2). The means for operatively connecting the shaft 83 to the motor 145 preferab y comprises a ielding driving device Hi-E w h which the shaft 95 is constrained to rotate. The device M2 comprises a hub 943 fixed to he t 95 and rotatably journaled on the hub i 3 is a grooved pulley M l. (See Figs. 3 and 11.) Pins M and W5 are fixed to the grooved pulley EM and the hub M3, respectively. A helical spring MS has its ends secured to the pins Hi5 M5, the construction being such that when the grooved pulley M 2 is driven, it will drive the hub M3 through the spring I43 and the hub :43 will, in turn, drive the shaft as. The spring M8 absorbs shocks, etc., and tends to drive the shaft 96 at a constant speed even though there are monetary variations in the speed at which the grooved pulley Md is driven.

The shaft of the motor Mil is provided with pulleys H36 and 553. The grooved pull y M4 is connected to the grooved pulley E55 by a plurality of bolts l5i. As shown, three belts are preferably employed for his purpose. The belts l5! drive the grooved pulley i i l at a substanially constant speed even though there are momentary variations in the speed at which the pulley i5 3 is driven by the motor Hail. Thus, slipping or whipping of one of the belts ltll is counteracted by the action of the other two belts f.

A grooved pulley !53 is fixed to the shaft 9'! and is operatively connected to the pulley lit by a plurality of belts I59. Three belts I59 are preferably employed for this purpose and they function in substantially the same manner the belts 56 so that the shaft 91 is driven at a substantially constant speed even though there are momentary variations of speed at which the pulley 556 is driven.

It will be noted that fly wheels 169 are provided upon the shaft of the motor 556. The function of the fly wheels H38 is to prevent any appreciable vaiation in the speed of the motor MB.

The gear H2 associated with the clutch jaws lilil meshes with a gear HG fixed to a clutch member I'll which is rotatably journaled on a bushing I74 adapted to journal the shaft section 34. The clutch member I'H forms one member of an over-running clutch which is designated generally by the reference character H2. As best shown in Figs. 3 and 10, the clutch H2 comprises a hub I13 fixed to the shaft section 34. The hub H3 is provided with diametrically disposed notches H5. Rollers I16 disposed in the notches H5 are yieldingly urged by springs ll! into positions wherein they will effect a driving engagement between the hub I13 and the clutch member I'll. When the clutch member I'll is 'on the shaft 98.

driven in a counter clock-wise direction, (Fig. 10), the springs ill will yield and the clutch mem er ill will stand stationary or rotate at a slow speed on the hub H3.

The gear 23 associated with the clutch jaws l2l meshes with a gear 30 fixed to a clutch member E84 which is journaled on a bushing i-SZ adapted to journal the shaft section (it. The clutch member 5535 forms part of an over-runhing clutch which is designated generally by the reference racter M33 and comprises a hub member i8 5, the hub member it being fixed to the sh ft section The over-running clutch W3 is preferably identical in construction with the over-running clutch and has the same unction. In other words, it permits the gear its to drive the shaft section 34 in one direction and permits the shaft section to be rotated in the same direction while the gear remains stationary or rotates at a slower speed.

Engaging the cam slot 55 is a pin 53 or the equivalent, which projects from a t 88 slidably journaled in a wall of the gear box H. The shaft N38 has its left hand end (Fig. 8) pivoted to a lever use which is pivoted by a pin 5%. Also pivoted on the pin 595 is a lever 55!. The 1 as end of the lever 58! is bifurcated and is provided with pins H2, or the equivalent, which engage an annular groove formed in a clutch collar 33, t-e clutch collar Hi3 being splined on the shaft 9%.

The levers ass and let resemble the levers and 8d, respectively, in construction and are connected to each other through a spring 495 which functions similarly to the spring 100 described above. However, in instance, no means is provided on the lever for pcond'ely displacing the lever 95 when the lever 855 is angularly displaced. In other words, all angular displacement of th le er by the lever is accomplished through the spring I96 which is considerably heavier than the spring described above.

clutch collar 563 is proclutch jaws on the two sides thereof, which clutch jaws cooperate with cl tch jaws on adjacent pulleys. sp ng its is of such size and strength that it w force the lever 555 in ither direction to engage he clutch jaws on it with one set of the adjacent clutch jaws on the adjacent pulleys.

The clutch collar ass is provided on one side with integral clutch jaws 262i) and on the other side with integral clutch jaws 25!. The clutch jaws 238 are engageable with clutch jaws 203 projecting from a pulley which is journaled The clutch jaws are engageable with clutch jaws 291 projectin from a pulley Zilfiwhich is rotatably journalcd on the shaft 83.

is operatively connected by The pulley 2 24 a belt 223 to p lley 2i i rotatably journaled on a stud shaft 2H5 which projects from a bracket 2&5 projecting from the gear box 24. (See Figs. 1, 3 and 9.) Constrained to rotate with the pulley is a gear 293 which meshes with a gear 2!?) fixed to a sleeve 259a rotatably journaled on the shaft 23. A pulley 225] formed integral with the sleeve 259a is operatively connected by a belt Hi to a pulley 22.! associated with the shaft 29, the pulley 222 being adapted to drive the shaft through a friction clutch which is designated generally by the reference character 223.

As best shown in Figs. 12 and 13, the friction clutch 223 comprises a friction disc 225 which is yieldingly urged against one side of the pulley 222 by a spring 226. The friction disc 225 is preferably formed from a phenolic condensation product, or the equivalent. The spring 225 is interposed between the friction disc 225 and a collar 228 splined on a sleeve 2% fixed to the shaft 29. It will be noted that the pulley 222 is rotatably journaled on the sleeve 236. The spring 225 comprises a hub portion 23! which encircles the sleeve 23B. Formed integral with the hub portions 23! are arms 232 which abut against the friction disc 225. A pin 235 projecting from the collar 228 passes between two of the arms 232 and through a hole 236 formed in the friction disc 225. A nut 237 screw threaded upon the sleeve 2% may be adjusted to increase or decrease the pressure exerted upon the disc 225 by the spring 226.

When the pulley 222 is driven by the belt 22!, the pulley drives the friction disc 225 and it drives the collar 228 through the pin 235. The collar 223 drives the sleeve 236 which, in turn, drives the shaft 29. The pin engages one of the arms 2320f the spring 22% and insures that the spring will rotate with the friction disc.

The sleeve 236 is keyed to the shaft, 29 which is journaled in a boss 260 provided upon .the upper end of a standard 242 secured to the shelf [6.

Referring now to Fig. 3, it will be noted that the pulley 2% is operatively connected by a belt 258 to a pulley 255 associated with the shaft 23. The pulley 25! is operatively connected to the shaft 28 through a friction clutch which is designated generally by the reference character 253. The friction clutch 253 is preferably identical in construction with the friction clutch 223 and permits relative angular movement between the pulley 25l and the shaft 28. The friction clutches 223 and 253 are both shown in section in Fig. 12. As best shown in Fig. 12, the shaft 28 is journaled in the bracket member 25$ and in a boss 256 formed integral with the standard 242.

From the foregoing description, it will be readily understood that when the shaft 96 is rotating and the clutch jaws 2M engage the clutch jaws the shaft 28 will be driven through the medium of the pulley 288, the belt 250, the pulley and the friction clutch 253. Then if the projector is functionally operative, the reel 26 will wind up film which is withdrawn from the reel 2? by the film advancing mechanism as. It will also be understood that if the clutch jaws 2%! are disengaged from the clutch jaws 2G1 and the clutch jaws 266 are brought into engagement with the clutch jaws 2%, the pulley 253 will drive the pulley 25! through the belt 25d and the rotation of the pulley 2H will be imparted to the sleeve 259a through the gears 2H8 and 2H. The pulley 229 formed integral with the sleeve may, will then drive the pulley 222 through the belt 221 and the pulley 222 will drive the shaft 25 through the friction clutch 223. When the haft 29 is driven in this manner, film carried by the reel 25 may be rewound upon the reel 2'1. When the film is being rewound, it is not threaded through the film advancing mechanism 353, which is then stationary.

The frictionclutch 253 permits the pulley 25! to rotate faster than the shaft 23' as the film piles up upon the reel 26 after it has been advanced by the film advancing mechanism 30. The friction clutch 223 permits the pulley 222 to rotate faster than the shaft 29 when the jaws The shaft section film piles up upon the reel 2? during the rewinddriven by the pulley device H32, it will be readily understood that if the clutch jaws i253 are brought into engagement with theclutch jaws l2l, the gear 23 will drive the gear Mid and thus rotation of the gear 388 will be imparted to the shaft section 3% through the over-running clutch 583. The gear section 3-:- will then drive the gear section 33 and the gear section 33 will, in turn; drive the film advancing mechanism at a predetermined speed. Now, if the clutch jaws H26 are left in engagement with the clutch jaws IZI and the clutch jaws E25 are brought into engagement with the clutch jaws lit, the shaft 96 will drive the shaft E28 and the worm I35 will drive the worm gear 3 5. The gear E36 will then drive the shaft or spindle l2fl which, in turn, will drive the turntable .69 at a predetermined'speed. Obviously, the projector may be operated while the phonograph is functionally inoperative or both mechanisms may be operated at the same time at predetermined speeds so that they run in synchronism with each other.

It is understood, of course that whenever the film advancing mechanism -38 is in operation, the shaft 28 is being driven through the friction clutch 253 to wind the film upon the reel 26.

Now, if it is assumed that the clutch jaws !26 are not engaged with the clutch jaws l2! and that the clutch jaws I25 areengaged with theclutch jaws 125, it will be understood that the projector will not be driven but the turntable i9 will rotate at a predetermined speed.

If the clutch members iZfi and the clutch members !25 are not engaged with the clutch members l2! and the clutch members 25, respectively, the projector may be driven, while the turntable remains stationary, by bringing the clutch jaws m into engagement with the clutch jaws H88 so that the gear H2 will drive the gear H0 and the gear H9 will, in turn, drive the shaft section 3;! through the over-running clutch I12. The film advancing mechanism may then be operated at a different speed than that at which it is operated when the clutch jaws I26 engage the clutch jaws 525.

Now, if the apparatus is adjusted so that the clutch jaws I25 engage the clutch jaws E26 and the clutch jaws llil engage the clutch jaws, use, the projector and phonograph will be operated in synchronism at predetermined speeds. is desired to have the phonograph run at a different speed while the projector is being driven through the clutch jaws It? and led, the clutch jaws E25 may be disengaged from'the clutch 28 and the clutch jaws 332 may be brought into engagement with the clutch jaws 63!. The shaft Q! will then drive the shaft I23 so that the worm E will drive the worm gear l36.

The cam grooves ti, 82, t3, and 6? are formed so that the apparatus may be adjuste in eight different combinations, each combination corresponding to one of the holes d8 provided in the disc '46.

first c0mbimLtion.The clutch jaws {25 engage the clutch jaws I26 and the clutch jaws E25 engage the clutch jaws 25. The clutch jaws 2B! engage the clutch jaws Zt l. The clutch collars 93 and 9t arein their neutral positions. 33 is then driven at 1440 R. P. M. while the turntablerotates at 33 R. P. M.

9|, 92 and 93 are in their neutral positions.

, records.

Second combinati0n.-The clutch jaws I25 engage the clutch jaws I26 and the clutch jaws IO'I engage the clutch jaws I38. The clutch jaws 29I engage the clutch jaws 291. The clutch collars 9! and 93 are in their neutral positions. The shaft section 33 is then driven at 969 R. P. M. while the turntable rotates at 33 R. P. M.

Third combination.The clutch jaws I32 engage the clutch jaws I3I and the clutch jaws I01 engage the clutch jaws I08. The clutch jaws ZIII engage the clutch jaws 231. The clutch collars 9I and 92 are in their neutral positions. The shaft section 33 then rotates at 960 R. P. M. while the turntable rotates at R. P. M.

Fourth combination.The clutch jaws IO'I engage the clutch jaws I08. The clutch jaws 28f engage the clutch jaws 208. The clutch collars The shaft section 33 then rotates at 960 R. P. M. while the turntable remains stationary.

Fifth combination.The clutch jaws I25 engage the clutch jaws I25. The clutch collars I93, I9I, 93 and 94 are in their neutral positions. The projector remains functionally inoperative while the turntable rotates at 33%, R. P. M.

Sixth combination-The clutch jaws I32 engage the clutch jaws I3I. The clutch collars I93, 9|, 92 and 94 are in their neutral positions. The projector remains functionally inoperative while the turntable rotates at 80 R. P. M.

Seventh combination.The clutch collars SI, 92, 93 and 94 are in their neutral positions. The clutch jaws 200 engage the clutch jaws 293. The reel 27 on the shaft 29 is driven to rewind the film.

Eighth combination.--The clutch jaws I23 engage the clutch jaws I2I and the clutch jaws 23I engage the clutch jaws 291, the clutch collars 92, 93 and 94 being in their neutral positions. The shaft section is then driven at 1440 R. P. M. while the turntable remains stationary. This adjustment is employed for sound film.

It'will be noted that the projector can be driven at two different speeds and that the turntable can also be driven at two different speeds. When the turntable is driven at 33 R. P. M. it is adapted to handle the new type long-playing When the turntable is driven at 80 R. P. M. it is adapted to handle the older type of phonograph records. In the first combination, the projector is adapted to handle films while the phonograph is simultaneously and synchronously reproducing sounds which were recorded when the picture was filmed. In the second combination, the projector handles silent film while the phonograph reproduces sounds or music from a phonograph record of the new long-playing type. In the third combination the projector handles silent film while the phonograph reproduces from a record of the older type. In the fourth combination, the projector handles silent film while the phonograph remains functionally inoperative. The projector remains functionally inoperative in the fifth and sixth combinations.

It will be noted that the shafts 28 and 29 and the mechanisms for driving these shafts are mounted independently of the film advancing mechanism 39. Thus, the shafts 28 and 29 projectfrom the bracket 34 which is part of the gear box I4. The film advancing mechanism 33 and the remaining parts of the projector are mounted on a bracket forming part of the gear box I4. (See Fig. 1.) It will be understood that when a film is to be projected, the reel holding the film is placed upon the shaft 29. The forward end of the film is then threaded through the film advancing mechanism 39 and attached to the reel which winds up the film as it passes through the film advancing mechanism. When a film is to be rewound, it simply passes from the reel on the shaft 28 to the reel on the shaft 29 without through the film advancing mechanism.

The entire mac line is controlled by the knob 59. With the exception of the task of threading the film through the film advancing mechanism and rewinding it, the operator need not manipulate any of the apparatus. Therefore, as indicated above, the apparatus does not require a skilled operator.

I claim:

1. In a transmission, a shaft, a second shaft having its axis coincident with the axis of the first mentioned shaft, a third shaft having its axis coincident with the axes of the first mentioned shaft and said second shaft, said third shaft being disposed intermediate the first mentioned shaft said second shaft, a fourth shaft spaced from extending parallel to the first mentioned shaft, means for driving the rst mentioned shaft, means for driving the second shaft, clutch means for coupling the first mentioned shaft to said third shaft, clutch means for coupling said second shaft to said third shaft, means including a clutch for operatively connecting the first mentioned shaft to said fourth shaft, and means including a clutch for operatively connecting said second shaft to said fourth shaft.

2. In a transmission, a shaft, a second shaft having its axis coincident with the axis of the first mention d shaft, a third shaft having its axis coincident with the axes of the first mentioned shaft and said second shaft, said third shaft being disposed intermediate the first mentioned shaft and said second shaft, a fourth shaft spaced from and extending parallel to the first mentioned shaft, means for driving the first mentioned shaft, means for driving the second shaft, clutch means for coupling the first mentioned shaft to said third shaft, clutch means for coupling said second to said third shaft, means including a clutch for op ratively connecting the first mentioned shaft to said fourth shaft, means including a clutch for operatively connecting said second shaft to said fourth shaft, and cam m ans for controlling said clutches.

3. In a transmission, a shaft, a second shaft having its axis coincident with the axis of the first mentioned shaft, a third shaft having its axis coincident with the axes of the first mentioned shaft and said second shaft, said third shaft being disposed intermediate the first mentioned shaft and said second shaft, a fourth shaft spaced from and extending parallel to the first mentioned shaft, means for driving the first mentioned shaft, means for driving the second shaft, clutch means for coupling the first mentioned shaft to said third shaft, clutch means for coupling said second shaft to said third shaft, means including a clutch for operatively connecting said second shaft to said fourth shaft, cam means for controlling said clutches, and manually operable means for bringing said cam means into a plurality of adjusted positions.

4. In a transmission, a shaft, a second shaft having its axis coincident with the axis of the first mentioned shaft, a third shaft having its axis coincidentwith the axes of the first mentioned shaft and said second shaft, said third shaft being disposed intermediatethe first mentioned shaft and said second shaft, a fourth shaft spaced from and extending parallel to the first mentioned shaft, a fifth shaft, means intermediate said third shaft and said fifth shaft whereby said third shaft drives said fifth shaft, means for driving the first mentioned shaft, means for driving the second shaft, clutch means for coupling the first mentioned shaft to said third shaft, clutch means for coupling said second shaft to said third-shaft, means including a clutch for operatively connecting the first mentioned shaft to said fourth shaft, and means including a clutch for operatively connecting said second shaft to said fourth shaft.

5. In a transmission, a shaft, a second shaft having its axis coincident with the axis of the first mentioned shaft, a third shaft having its axis coincident with the axes of the first mentioned shaft and said second shaft, said third shaft being disposed intermediate the first mentioned shaft and said second shaft, a fourth shaft spaced from and extending parallel to the first mentioned shaft, a fifth shaft, means intermediate said third shaft and said fifth shaft whereby said third shaft drives said fifth shaft, means for driving the first mentioned shaft, means for driving the second shaft, clutch means forcoupling the first mentioned shaft to said third shaft, clutch means for coupling said second shaft to said third shaft, means including an over-running clutch for operatively connecting the first mentioned shaft to said fourth shaft, and means including an over-running clutch for operatively connecting said second shaft to said fourth shaft.

6. In a device of the kind described having a motion picture projector. and a phonograph,

ate the first mentioned shaft and said second:

shaft, a'fourth shaft spaced from and extending parallel with the first mentioned shaft, said.

fourth shaft being adapted to drive said projector, a fifth shaft for driving said phonograph,

means operatively connecting said fifth shaft to said third shaft, clutch means for coupling the first mentioned shaft to said third shaft, clutch means for coupling said second shaft to said third shaft, means'including a clutch for 0peratively connecting the first mentioned shaft to said fourth shaft, and means including a clutch for operatively connecting said second shaft to said fourth'shaft.

7. In a device of the kind described having a motion a picture projector and a phonograph, means for operating said projector and said phonograph, said means comprising an electric motor, a shaft, a second shaft having its axis coincident with the axis of the first mentioned shaft, means operatively connecting the first mentioned shaft to said motor, means operatively connecting the second shaft to said motor, 2,

third shaft having its axis coincident with the axes of'thejfirst mentioned shaft and said second shaft, said third shaft being disposed intermediate the first mentioned shaft and'said second shaft, a fourth shaft spaced from and extending parallel with the first mentioned shaft, said fourth shaft being adapted to drive said projector, a fifth shaft for driving said phonograph, means operatively connecting saidfifth shaft to said third shaft, clutch means for coupling the first mentioned shaft to said third shaft, means including a clutch for operatively connecting the first mentioned shaft to said fourth shaft, means including a clutch for operatively connecting said second shaft to said fourth shaft, cam

means for controlling said clutches, and manu-c ally operable means for bringing said cam means into a plurality of adjusted positions.

8. In a device of the kind described having a motion picture projector and a phonograph, said motion picture projector including a shaft, a reel for rewinding film, means for operating said projector and said phonograph, said means comprising an electric motor, a second shaft having its axis coincident with the first mentioned shaft, means operatively connecting the first-mentioned shaft to said motor, means operatively connecting the second shaft 'to said motor, a v

third shaft having its axis coincident with the axes of the first mentioned shaft and said second shaft, said third shaft being disposed intermediate the first mentioned shaft and said second shaft, a fourth shaft spaced from and extending parallel to the first mentioned shaft, said fourth shaft being adapted to drive said projector, a'

a clutch for operatively connecting the first mentioned shaft to said fourth shaft, means including a clutch for operatively connecting said second shaft to said fourth shaft, means including a clutch for operatively connecting the first mentioned shaft to said rewinding shaft and said reel, andmanually operable means for controlling said clutches.

9. In a-device of the kind described having a motion picture projector and a phonograph, mechanism for operating said projector and said phonograph, said mechanism comprising an electric motor, means driven by said motor and including a plurality of clutches for actuating said projector at a plurality of predetermined speeds, means driven by said motor and including a clutch for actuating said phonograph, a shaft, cam means on said shaft for controlling said clutches, and manually operable means for rotating said shaft to bring said cam means into aplurality of adjusted positions.

10. In a motion picture projector, an electric motor, means driven by said motor and including a plurality of clutches for actuating said projector at a plurality of predetermined speeds, a shaft, a cam fixed to said shaft, a second shaft geared to the first mentioned shaft, a knob on said second shaft whereby it may be rotated to bring said cam into a plurality of adjusted positions, and means associated with one of said shafts for retaining said cam in said adjusted positions.

HERMAN B. GARDNER. 

